Sergey Alekseevitch Selkov

D. O. Ott Research Institute of Obstetrics and Gynecology · Department of Immunology

Natural killer (NK) cells are a population of innate immune cells that have cytotoxic functions and are involved in protecting the body from viruses and transformed cells. Placental development is determined largely by the interaction of decidual NK cells and trophoblast cells. During pregnancy, NK cells accumulate around trophoblast cells, while r...

BACKGROUND: Endothelial dysfunction is the leading pathogenetic factor of preeclampsia. The function of the endothelium may be reflected in its ability to form microvesicles, which are generated by cells through the regulated shedding of the plasma membrane. AIM: The aim of this study was to evaluate the endothelial microvesicles count in periphera...

Type 2 diabetes (T2D) is a chronic metabolic disorder marked by insulin resistance and relative insulin deficiency, affecting over 422 million people globally and projected to increase, making it a major public health concern. This condition is associated with severe complications such as retinopathy, nephropathy, cardiovascular diseases, and neuro...

Natural killer cells (NK cells) are a population of innate immune lymphocytes capable of cytolysis of infected or transformed cells without prior sensitization. Natural killers are detected in various organs and tissues and may differ in phenotypic and functional characteristics depending on localization. For example, NK cells are the dominant popu...

Genetic constructs must be delivered selectively to target tissues and intracellular compartments at the necessary concentrations in order to achieve the maximum therapeutic effect in gene therapy. Development of targeted carriers for non-viral delivery of nucleic acids into cells, including those in muscle, which is one of the most challenging tis...

Natural killer (NK) cells are a population of innate immune cells that have cytotoxic functions and are involved in protecting the body from viruses and transformed cells. Placental development is largely determined by the interaction of decidual NK cells and trophoblast cells. During pregnancy, NK cells accumulate around trophoblast cells, while r...

The interaction of natural killer and trophoblast cells underlies maternal-fetal immune tolerance. The data on the participation of endoglin (ENG, CD105), or its soluble form, in the regulation of the communication of these cells are currently insufficient. In this study, we have investigated the role of endoglin in the intercellular interactions b...

This review presents current data on the origin of monocytes/macrophages, the conditions necessary for the differentiation of monocytes into M1 or M2 macrophages. Three subpopulations of peripheral blood monocytes are described: (I) classical – the main subpopulation (85-90%), effectively carrying out phagocytosis; (II) intermediate monocytes (5-10...

Uterine leiomyoma (UL) is a prevalent benign tumor in women that frequently gives rise to a multitude of reproductive complications. The use of suicide gene therapy has been proposed as a highly promising method for treating UL. To achieve successful gene therapy, it is essential to develop carriers that can efficiently transport nucleic acids into...

BACKGROUND:In obstetrics and reproductive medicine, the use of intravenous immunoglobulin remains controversial. There are no clearly developed indications for immunoglobulins therapy. The search for immunological criteria for prescribing this therapy is an urgent task AIM:The aim of this study was to evaluate the effectiveness of the use of intrav...

Extracellular vesicles (EV) are currently considered potential biomarkers of diseases, as well as “biological constructs” for targeted drug delivery. Extracellular vesicles represent a heterogeneous population of membrane vesicles formed by various cell populations, including immune cells. At present time, EV are divided into exosomes, microvesicle...

Natural killer (NK) cells represent one of the innate lymphoid cell subsets, which are often studied in the context of antitumor and antiviral immunity, as well as due to their localization in the zone of the mother-fetus contact (in the uterus), therefore underlying their extensive investigation in developing pregnancy. At the same time, their rol...

The important role of human chorionic gonadotropin in pregnancy suggests the occurrence of reproductive disorders due to the circulation of specific antibodies, especially in early pregnancy, which can lead to a cascade of pathological reactions such as implantation failure, placentation, trophoblast invasion, and ultimately fetal rejection. The la...

BACKGROUND:Over the years, preeclampsia has remained a common pathology of pregnancy. Its severe form poses a significant threat to the health of the woman and the fetus. To assess the risk of developing preeclampsia, biochemical screening for placental growth factor and soluble tyrosine kinase-1 is carried out. The soluble glycoprotein endoglin, w...

Objective Attributable to the insulin‐like growth factor (IGF) axis involvement in fetal growth regulation, possible contribution of the maternal IGF axis to antenatal fetal macrosomia diagnosis is a subject of particular interest in diabetic pregnancy. Methods A total of 130 women were prospectively enrolled in a longitudinal single‐center cohort...

Each stage of angiogenesis depends on the nature of the communication between endothelial cells and the microenvironment, and on the complex balance between stimulators and inhibitors of this process. Natural killer cells secrete a variety of cytokines and chemokines that can influence the microenvironment. The aim of this study was to assess the e...

The interaction of natural killer (NK) and trophoblast cells underlies the formation of immune tolerance in the mother–fetus system and the maintenance of the physiological course of pregnancy. In addition, NK cells affect the function of trophoblast cells, interacting with them via the receptor apparatus and through the production of cytokines. Mi...

In this review, an attempt was made to substantiate the possibility for neurotrophins to be involved in the development of immune tolerance based on data accumulated on neurotrophin content and receptor expression in the trophoblast and immune cells, in particular, in natural killer cells. Numerous research results are reviewed to show that the exp...

Aim. To study the levels of proangiogenic and antiangiogenic growth factors in vitreous fluid in choroidal melanoma by multiplex flow cytometry. Methods. The concentration of proangiogenic (IL-8, angiogenin, TNFα, VEGF, bFGF) and antiangiogenic (IFNα, TGFβ, IFNγ) growth factors in the vitreous fluid of 5 patients with choroidal melanoma (MC) was de...

Angiogenesis is the development of new blood vessels from pre-existing ones. It is a complex multifaceted process that is essential for the adequate functioning of human organisms. The investigation of angiogenesis is conducted using various methods. One of the most popular and most serviceable of these methods in vitro is the short-term culture of...

Intercellular communication plays a huge role in the vital activity of living organisms. At present, far less studied is distant cellular communication, in which, along with autocrine and paracrine regulations by soluble factors (e.g. cytokines and growth factors), of particular interest is communication by means of microparticles via their ligand-...

Введение. Адекватный контроль функциональной активности тромбоцитов, в том числе при воздействии антиагре­гантных препаратов, является нерешенной проблемой лабораторной диагностики. К наиболее часто используемым методам определения функциональной активности тромбоцитов относятся оптическая агрегатометрия и проточная цитометрия. Цель исследования: о...

BACKGROUND: Currently, more than a hundred immunological biomarkers are known that are important for fertilization, implantation and placentation. AIM: The aim of this study was to assess the immunological profile for the main allo- and autoantibodies in women with reproductive loss and infertility in the North-West region of the Russian Federation...

BACKGROUND: Immune mechanisms play a leading role in the pathogenesis of early reproductive loss. Modern methods of regulating disorders of immune homeostasis to overcome infertility and recurrent miscarriage include immune-efferent therapies such as immunocytotherapy, plasmapheresis, and intravenous administration of immunoglobulins and fat emulsi...

Natural killer cells (NK cells) represent a group of lymphocytes of innate immunity. In addition to NK cells of peripheral blood, tissue-resident populations are described. NK cells of the decidual envelope (decidual NK cells) represent one of the local NK cell populations. Decidual NK cells differ in phenotype and function from peripheral blood NK...

Uterine leiomyoma is the most common benign tumor of the reproductive system. Current therapeutic options do not simultaneously meet the requirements of long-term efficiency and fertility preservation. Suicide gene delivery can be proposed as a novel approach to uterine leiomyoma therapy. Non-viral vehicles are an attractive approach to DNA deliver...

Цель работы: изучить информативность и целесообразность жидкостной биопсии при увеальной меланоме (УМ). Материалы и методы. Выполняли жидкостную биопсию (синоним: биопсия стекловидной жидкости, СТЖ) энуклеированных глаз с УМ. Пробы СТЖ использовали для количественной оценки концентрации про-(IL-8, angiogenin, TNF-α, VEGF, bFGF) и антиангиогенных (...

Актуальность Возрастная дегенерация макулы (ВМД) является ведущей причиной необратимой потери зрения и слепоты среди пожилых людей в развитых странах. Клинически ВМД делится на два основных типа: сухая ВМД и неоваскулярная ВМД (нВМД). Последняя является основной причиной слепоты. Известно, что вероятность развития внутриглазного неоангиогенеза при...

Глаукома, по данным ВОЗ, является одной из ведущих причин необратимой слепоты во всем мире и относится к ассоциированным с возрастом заболеваниям. Вместе с тем, ее патогенез остается не до конца изученным. Определение концентрации цитокинов в культуре клеток трабекулярной сети и водянистой влаге (ВВ), взятых от одного и того же пациента, имеет особ...

Blood platelets are the central players in thrombosis and blood coagulation. Moreover, they also exhibit immunoregulatory properties and bridge hemostasis and immunity. Morphological and functional characteristics of the platelets ensure continuous surveillance for the vascular system, recognition of different hazards, development of appropriate re...

Purpose : to study the informativeness and appropriateness of liquid biopsy in uveal melanoma (UM). Material and methods . Performed a liquid biopsy (synonym: vitreous fluid biopsy, CST) of enucleated eyes with UM. CST samples were used to quantify the concentration of pro-(IL-8, angiogenin, TNF-α, VEGF, bFGF) and antiangiogenic (IFN-α, TGF-β, IFN-...

Microvesicles are membrane-derived formations ranging in size from 100 to 1000 nm, being produced by a variety of resting and activated cells. They can transfer their cargo to target cells, regulate physiological processes, and participate in the development of clinical disorders. Among the microvesicles of different origin, natural killers are of...

Purpose : to study the level of pro- and antiangiogenic growth factors in the vitreous fluid of the eyes with the neovascular form of agerelated macular degeneration (nAMD) against the background of antiangiogenic therapy. Patients and methods . The concentration of proangiogenic (IL-8, angiogenin, TNF-α, VEGF, bFGF) and antiangiogenic (IFN-α, TGF-...

Иммуноглобулины для внутривенного введения (ВВИГ) применяют в терапии бесплодия. Предполагается влияние ВВИГ на цитотоксическую функцию NK-клеток, однако механизм действия ВВИГ остается неясным. Цель: Оценка влияния препарата ВВИГ на цитотоксичность NK-клеток в отношении клеток-мишеней линии К-562 и клеток трофобласта линии JEG-3. Материалы и метод...

Aim: to study the level of pro- and antiangiogenic growth factors in vitreous fluid in neovascular AMD. Methods. The concentration of proangiogenic (IL-8, angiogenin, TNFα, VEGF, bFGF) and antiangiogenic (IFNα, TGFβ, IFNγ) growth factors in the vitreous fluid of 24 patients with the neovascular form of age-related macular degeneration (nAMD) was de...

Important peculiarities of various technologies used for manufacturing the API of prostate extract that determine different qualitative characteristics of the final product are described. Data on the physicochemical and biological properties of APIs essential for the production of finished dosage forms possessing the desired safety and efficacy ind...

Endometriosis is a chronic gynecological disease, which poses a serious problem in terms of diagnosis and treatment. Despite decades of research, there are no specific signs and symptoms and no blood tests to clinically confirm the diagnosis, which makes timely diagnosis and treatment difficult. Therefore, the search for new markers for early non-i...

В статье описываются особенности разных технологий производства активной фармацевтической субстанции простаты экстракта, обеспечивающие различные качественные характеристики конечного продукта. Приводятся данные, характеризующие субстанцию простаты экстракта с точки зрения ее физико-химических и биологических свойств при использовании для производс...

Objectives Diabetes mellitus (DM) in pregnancy and gestational diabetes remain a considerable cause of pregnancy complications, and fetal macrosomia is among them. Insulin, insulin-like growth factors (IGFs), and components of their signal-transduction axes belong to the predominant growth regulators and are implicated in glucose homeostasis. This...

We analyzed the effect of individual cytokines that are secretory products of placenta typical of the uteroplacental bed. The proinflammatory cytokines IL-6, IFNγ, and IL-1β increased the expression of TGFβR2 molecule by trophoblast cells, while VEGF and PLGF increased the expression of CD45, CD29, and CD54 adhesion molecule by trophoblast cells. T...

During pregnancy, uterine NK cells interact with trophoblast cells. In addition to contact interactions, uterine NK cells are influenced by cytokines, which are secreted by the cells of the decidua microenvironment. Cytokines can affect the phenotypic characteristics of NK cells and change their functional activity. An imbalance of pro- and anti-in...

Suicide gene therapy was suggested as a possible strategy for the treatment of uterine fibroids (UFs), which are the most common benign tumors inwomen of reproductive age. For successful suicide gene therapy, DNAtherapeutics should be specifically delivered to UF cells. Peptide carriers are promising non-viral gene delivery systems that can be easi...

Developing of chronic salpingoophoritis, non-specific bacterial vaginitis and specific candidamytotic vaginitis ought to be associated with complicated obstetric anamnesis and presence of biovar Parvo ureaplasmas predominantly found in womens genital tracts. The correlation may be seen between identifying biovar Parvo ureaplasmas in men and arising...

В статье представлены собственные данные авторов, полученные при исследовании спектра и продукции некоторых цитокинов эндометриоидными гетеротопиями в условиях органотипического культивирования, в сопоставлении с секреторной активностью клеток перитонеального эксудата и тканью эндометрия у женщин с наружным генитальным эндометриозом. Выявленные соо...

HPV 16 and 18 are known to be the main cause of cervical intraepithelial neoplasia (CIN) and cervical cancer. The terms of HPV persistence in the host and, coordinately, the risk of cervical neoplasia development and progression are determined in much extent by virus activity. The purpose of this investigation was the detection of HPV DNA presence...

Natural killer cells (NK cells) are innate immunity lymphocytes. NK cell differentiation is controlled by the cellular microenvironment and locally produced cytokines, including IL-2, IL-15 and IL-18. NK cells are present in various tissues, forming pools of tissue-resident NK cells, e.g., decidual NK cell pool. Peripheral blood NK cells (pNK cells...

Microvesicles (MVs) are plasma extracellular vesicles ranging from 100 (150) to 1000 nm in diameter. These are generally produced by different cells through their vital activity and are a source of various protein and non-protein molecules. It is assumed that MVs can mediate intercellular communication and modulate cell functions. The interaction b...

Natural killer cells (NK) are innate immune lymphocytes produced in the bone marrow. Isolation of NK cells as a separate population of lymphocytes is related to discovery of their ability to induce the death of tumor cells without prior sensitization. In this review, an attempt was made to systematize the numerous data on the biology of NK cells pr...

T-lymphocytes are present in the endometrium before pregnancy and their number varies depending on menstrual cycle stage. Despite T-lymphocyte population heterogeneity, there is no clear vision of general mechanisms of decidua T-lymphocyte pool formation. One of the assumed variants is T-lymphocyte proliferation in situ. The study objective is to e...

This review analyzes and generalizes the results of the studies characterizing the interaction of peripheral blood platelets and monocytes, which have been conducted to define their role in various physiological and pathophysiological processes. At the same time, special attention was given to reproductively significant processes. Due to the fact t...

Many infertile couples cannot achieve pregnancy after repeatedly implemented assisted reproductive technology (ART) programs, as well as its successful prolongation, even with the transfer of good-quality euploid embryos. In this connection, repeated implantation failures (RIFs) in the in vitro fertilization (IVF) protocols and recurrent miscarriag...

NK cell development is affected by their cellular microenvironment and cytokines, including IL-15 and IL-18. NK cells can differentiate in secondary lymphoid organs, liver and within the uterus in close contact with trophoblast cells. The aim was to evaluate changes in the NK cell phenotype and function in the presence of IL-15, IL-18 and JEG-3, a...

Inflammatory diseases of the vagina related to imbalanced microflora composition represent one of the most common gynecological diseases primarily dealt with by obstetrician/gynecologists. Such diseases markedly worsen female patient quality of life as well as affect female reproductive system resulting both in altered fertility and adverse pregnan...

Monocytes\macrophages regulate angiogenesis via cytokine production and contact interactions with endothelial cells (ECs). The biological effects of macrophage-derived microvesicles (MVs) are studied using cell lines, such as monocytic leukemia THP-1 cell line. The effect of MVs produced by THP-1 cells on EC phenotype and functions remain understud...

Extracellular vesicles that are shed from the plasma membranes take an active part in intercellular communication, transporting a wide range of molecules, including proteins, lipids, nucleic acids and carbohydrates, being of great functional importance. One of the steps to better understanding of distant communications of cells and their regulatory...

Activated platelets aggregate with monocytes by binding membrane bound molecules. Platelet-monocyte interaction is considered to underlie pathophysiological mechanisms bridging thrombosis and inflammation. Detection and analysis of platelet-monocyte complexes (PMC) provide means for revealing their physiological and pathogenetic roles and are instr...

Glaucoma is one of the leading causes of irreversible blindness worldwide, being an age-related disease. Its pathogenesis still is not fully understood. A particular interest is attracted to evaluation of the cytokine concentrations in the trabecular meshwork cell culture, and in the aqueous humor (AH) taken from the same patient, since such data m...

Uterine leiomyoma (UL) is one of the most common benign tumors in women that often leads to many reproductive complications. Suicide genetherapy was suggested as a promising approach for UL treatment. In the present study, we describe iRGD ligand-conjugated cysteine-rich peptide carrier RGD1-R6 for targeted DNA delivery to αvβ3 integrin-expressing...

Objective The present study was to estimate the role of cytokines for trophoblast death in NK cells presence. Methods This study involves assessment of NK-92 line NK cell cytotoxic activity against JEG-3 line cells, in presence of cytokines. We also assessed the effect of secretory placenta products on NK cell cytotoxic activity toward JEG-3 line...

Glaucoma is one of the leading causes of irreversible blindness worldwide and belongs to age-related diseases. However, its pathogenesis is not fully understood. Primary open-angle glaucoma (POAG), pseudoexfoliative (PE) glaucoma are the most common forms of glaucoma. Increased intraocular pressure (IOP) is one of the main risk factors for glaucoma...

We studied the effect of microvesicles derived from cells of the NK-92 cell line on the for-mation of tube-like structures by endothelial cells of the ЕА.Hy926 cell line. Microvesicles were isolated by differential centrifugation and their size was controlled by granulometric analysis using dynamic light scattering method. The effect of microvesicl...